As it stands now, to be able to worship Draconic Deities that are not Bahamut or Tiamat, you have to either:
1) Not be a Cleric
2) Be a Dragon PC Cleric (Physically impossible anymore)
3) Be a Cleric PC with 10 levels of the RDD Prestige Class (Cleric RDD does not synergize.. at all, worse than a 20 sorcerer / 10 RDD)
4) Spend a Gift on the Gift of Devotion on a Cleric PC to be allowed to select them.
Part of this is my own personal interest in this, as I want my Kobold Cleric to be able to worship a draconic deity without having to use up one of my gifts on the gift of devotion, but it seems just so strange of a restriction for a number of gods on the deity list. It feels especially weird that kobolds (Whom lore wise have been venerating and worshiping dragons, and share bloodlines with dragons) do not qualify at all to worship draconic deities without taking a gift for it.
Originally the gift of devotion, was so that non-clerics could do things like bless altars, which added flavor to non-clerical classes if someone wanted that. It was optional it was a nice flavor thing.
Now it just feels.. sort of forced on clerics, unless you want to just RP as whatever the default worship for a specific race is. Feels more like a tax or a restriction for wanting to do something slightly different than something that actually enchances gameplay or storytelling.